If she mule kicked, you hit her. If you would have blown her brisket off, she would have bled profusely... A blind person could follow the trail for a 100yds before it started to peter out.. Sounds like you hit her low and back from the heart.. or you straight up heart shot her. No blood on a heart shot is rare though..

__________________"Human footprints, I find, are always a disappointment in the wilderness, even when they are my own."

Or you couldíve been looking in the wrong place.... Blood trail could be 10 feet away from you. Tracking in a grown up field and marking her exact spot can be difficult.

I know that all too well at Panola and in basically the same spot he is hunting. Very first hunt there I shoot a doe right at first light. I see her run 40-50 yards and fall. Get down and walk over and can't find blood. A grown up field looks very different from the ground. I did find her after doing circles for 10 minutes, but it is amazing how hard they can be to find in that grown up stuff. She didn't bleed a drop even though her insides were mushed completely.